// JavaScript Document
//点击式下拉菜单，左
var total=5;
function showMenu(index)
{
//alert(index);
for(var i=1;i<=total;i++)
{
	var id="menu_item_"+(i);
	if(i==index)
		{
			if(document.getElementById(id))
			{
			 	if(document.getElementById(id).style.display=="block")
					document.getElementById(id).style.display="none";
				else
					document.getElementById(id).style.display="block";
			}
		}
	else
		if(document.getElementById(id)) document.getElementById(id).style.display="none";	
}
}


//下拉菜单
<!--
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->

/*图片滚动
var speed=40;
var demo=document.getElementById("demo");
var demo1=document.getElementById("demo1");
var demo2=document.getElementById("demo2");
demo2.innerHTML=demo1.innerHTML;
function Marquee(){
  if(demo2.offsetWidth-demo.scrollLeft<=0){
   demo.scrollLeft-=demo1.offsetWidth;}
     else{demo.scrollLeft++;}
     }
var MyMar=setInterval(Marquee,speed);
demo.onmouseover=function() {clearInterval(MyMar)};
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}; */